Scale



.lune 24, 1930. v B. w; KING 1,766,826

SCALE Filed Sept. 50, 1927 2 Sheets-Sheet l I N VEN TOR.

B. W. KING SCALE 2 sheets-sheet 2 Filed Sept. 30. 1927 l O Q a U .5 e 2 M 0 4,0m 2 .6 0 J..... 5 ww @6N 3 Q .4 /MB Le .w w .d in #fw Q ra,

Patented `lune 2.4,` 1930 UNITED# STATES PATE-Nr ersten .A

BERT W. KING;

ODETROIT, MICHIGAN, lAssrefNoJa To 'BARNES scALn COMPANSL'OF' DETROIT, MICHIGAN, A coRPoRAToN or MICHIGAN SCALE Appiicat'ibn fue@ september 3o, 1927. serial No. 223,162.

This invention relates toascale with partlcular reference to ajscale mechanism adapted to operate subject toca coin or. check conj, the insertion-'of' a' Vsingle coin.

trol. ,1. ,i I

Such scales are used mostly in vpublic pl'acest seth-at persons can ascertain their. weight by inserting afproper coin. The invention: ncontemplatesl an improved mechanismk whichv isconstructed so as to precent more than-'lone vweighing operation on There are a number of eaturesof noveltyin the mechanism which include a thermostatic' control. due kto which; the scale fis accurate at various temperatures; a counter-Weight construe* tion which etects a nicety -ot action; ar'- rangementswhereby to permit adjustments tion uponthe insertion: of acoinor check.

1 Fig. -Qisafview similar to Fig. .1, showing vthe'partsas they appear-when operating and while a weight is onv the scale.

Fig. .3I isian enlarged viewf showing details `of. the steelyard arrangementl and the counterbalancing spring arrangement.

Fig. 41 isa ydiagrammatic view ot certain of the scale leversindicating, inf-an exaggerated manner, their movements caused by` the thermostat to Iaccommodateifor varying.` temperatures-.I

y'.ll'hegscalef hasa suitable housing with a head 1 which .carries mostof t-he Ascale mechanism, and `,which also includes a pointer and Vdial (not shown) The headiis supported by a postzZw-hichf in turn isjpnovided withthel customarylbase portion= (not shown),- fithin tl'iebase portion of thelmachine are suita- 4 ble scaleleverswhich includea nose iron connectedl toa steel ard4 inthe same` beinel Y, s

adjustablyconnected,E as at ,to a cross arm 6.. A- weigliton thescale platforincausesthe cross arm 6 to move downwardly, the dise tance oi which is` determined by weight counterbalancing springsjv?. f A pivotedarm scale 9 is connected to the cross arm @by a connecting member or secondary steelyard 10 which vis adjustable as -at 10,, so that this arm moves inY accordance with the actuation of the scale levers.

Counterbalancing` springs are suspended from a cross member 8 which is carried by a pivoted supporting member 11 (Fig. 1). This cross member k8 pivotsin the' member so as'to act as an equalizer. Member 11 may be adjusted on its pivot by means of a set screw 12. This construction alfords an adjustment of the springs'and scale 'mechas nism in addition to the adjustments of the steelyardsi AA'dash pot 13 islassociat'ed with the arm 9 to control the movements' of this member and the associated* parts inv the-usual manner. v

The parts thus described are those parts which move when a weight is placedon the platform. The weight is not-indicated, however, until the proper coin or check'is placed in the machine to free what may be termed the follower mechanism now to be described.v

This follower mechanism consists' primarily of an arm 15 pivoted, as at 16, and carrying adepending'r rod 17 The lower end of the rod 17 rests'in aI socket V18'on'the arm 9, in the nature of a pin pointbearing. The' rod 17 is adjustably connectedtofthe arm 15, as at-19.'v A rack member'20also depends uponthe -arm 15. This rack member Aengages with' a `gear 21 mounted on a shaft 22which shaft'carries an indicating` poin 'er operating over a suitable dial (not showny- The primary operation is as follows;

A weight'ona platform pulls the arm'Q downwardly,- 'and pulls' the socket 18 away from thelower end of" the rod 17; ,upon the insertion of a proper'coinor check-*the follower arm' 15. drops until the rod 17 sets in the socket 18, this movementeffecting a rotation-.of the shaft 22 andthe pointer.A carried thereby, through the means of the rack. and geaiu This dropping movement ofA the follower, arm is givena nicety of action,l and a counter-weight. 23' mountedvon the pivoted arm 24 having a link connection 25 with the follower arm. The counter-wcightQS isadi justable on the arm A24 by screw threads and lock-nut 26. Y

e The mechanism for controlling the movement of the follower arm is shown in Fig. 1

in locked position, or in other` words, in a coin chute 1s shown at 27 and afcoin falling from this chute drops down into thecoincup 2e, carried by thepiveted erm 29. The weigltof the coin deets this armfiom" theI position shown in Fig. V`1 to'that in Fig. l'2; whereupon the arm is retained in thisv position by a suitable catch 30, the catch 'being eoiinterbalanced as shown. Therm!! isthen.A depositedinto a second chute 3l Where it is conducted to a I'suitablecoin tray.V- i "Aipivo'ted checkmember 32 hasganfepen'- rough whch'the armf29=passesgasat 33ey As shown in'Fi 1, this check member underlies the end o the follower arm, 1:5 and revents theesame from'mmn'ng' down war y. The pivotal movement of the arm ihowever, results lin a camming action at thepoint 33 and pivots the arm to the positionshown in Fig, 2 whereupon the follower arm moves downwardly to resultin the india. cationV of the weight. j ZThe remaining mechanism tolbe described has tp do, in themain, with the preventing cfa second weightindicationan -withthe reset f of hanism whenthe load is remove from. scale platform so `that the parts are in position for a second operatipnwhen a proper, coin or check isnserted.- u upright lratcheted member .35iei carby the arml 9and adjacent this ratchet member is a pivoted catch 36 vwhich carries `l`a wl 37 acted npon ,by a spr 38. The member 36 is so weigh .that it as-y snmes a sitonhvvith( the pawl xinengagement wit the ratchet. Downward -niove-Y ment, of the ratchet, in the yweighing opera tion causes the vwl to snap along the @pellet teeth. iiUin. the platform upward movement of the ratcheted member? engages the pawl and the catch member-.36 on tspivqt.. In doing the catch 36 strikes the coin lever at the cntft to release the coin cup' and' rmt 1t and the catch 32to return Ato norm osition.

The cato Bengages overa pawl41 which coo rates with alratchet wheel 42 on'the sha The catch 36' normally holds this 55 paw] Yfrom en inentwith the' ratchet wheel. "Upon actuation of the 36, the vawl 31 is released andit is so balanced as to onto the ratchet teeth on the wheel 42. locks the shaft 22 s0' that re-weighing ifrevented. The` catch 86 is heldoutwardy a pivoted latch member v4:3 which drops cver'the upper end ofthe catch whenv it is positioned outwardly by the action Yof'the pawl 37'. "65 Thislockingv action of the weighing mechje y 1,766,820

position to prevmtj indication of-,weiight A tlns en weight is removed by the timaryltsteelyad-A bers1 be' adjustable scales Aterbalanee wei t 23 ee'tiatthereie en ease anism takes place upon removal of a slight amount of' weight from the scale platform.

In other words, a sli ht upward movement of the arm 9 rocks e catch 36 to release' the awl 41-the catch bein held back the fenewerfm 15 teL e enable opening in the dog 41, and the end of the chain is pro' r vided with an enla ment 46; this arrangementprevides'zfoet `.lifti of the dog 41"`fl.;

from the ratchet43 substantially at the inf stunt `that the followenaxnfl. reaches :itsf

uppermost peutz ion. theL arm-fl'jj" e maches'this'n o ver' theppper en ofthe lvoted catchmembrl" fsofas to be-held-f't rehy. "Immediate aiming-meaning efthepawi 41 thel 1e '43 @raised-hy a memher`}51; which`catcheg the outerfeadof the latchffnd'raisea the same. This permits the 86th swingj beek einen Fig. weY y that shownin' ig. lg'engagngthe pawl 41j and `'hoilcli'l'lgthe same contacting with the ratchetfwheeli. e parte are now'in operated' when a'fcoi is' theefatcl-member 32.v It is .to be n eted that the'arangement preventing a second" hing operation comes play when "afs ight amounboiew weight is removedffrom' the escale' platforx A very slight upward movement of the ratchet member 35 rocks theieatch B6, and' 7 the .i `paci 4r immediately" j.' ente joie,- fs-.

ratchet wheel# 4Thearte'etty'11;'hSPOSi1 een ee am rewei imgy eea-not be hufee throughout -the entire return. innevamento! theY parte,A and the parte reset lary-tlmlilla!` p upward movement ofthe follower-arm 15.i The'several adjuetment'-featnres makepose e sible accuratefadynstment of the machine sfc correctweighing. between the no eeiron'and' the feilcwernm 15'isbri v the secondary steelyar landithe rod 174,111 of these mermthe s edV follower mechanismfaa present onegfthereeordinax'ily e quick drop of the follower mechanism releaseof if 'the mechanism.Y In"the prasntscalethisierifl drop is' controlled-mier les by the ai of movement thedownward dropl of the A' feuewermeeheeiem meagre@ eeieeey en.;

action Vandl eliminates glaelvibration'fand wear andtear on the arti H26 ootrolledscas ofg'tliistype are sometimes buildings' vvheri#y the eemfieemre' is' relatively high, ere't l sometimes placed outof doors w scales areI subjected to varying temperatures..

Accordingly, a ,thermostat is. placed on the presentscale so thatthe saine operates corl trectly at these. varying Vtempe iatures'. The

will be no tedthat-.thelarms or levers 9 and l5 are mounted on pivots .so that they work in r-everse .a rcs'. v This; arrangement therniostat unit perse may Vconsist of a VU shaped bi-metallic member'. 60 with one end fixed andthe other end rfree. The l'free end of the thermostat isl comiected te a rod 6l. iorf controlli/ngn )the vscale mechanism.

.The follower arm l5 is pivoted to a support '62 mounted `to rock, as at 63. This support 62 mayr `l be lbifurcated and the rod 6l is as .at4 6l, between these bifn rcated parte y ontractingv and expanding movements ofthethermostat el'ectsl rocking of the sup-f port 6 2', andthis in turnshiits theposition of the follower arm., This eiects variation r of the angular positioniof the rack 90 with respect to the gear wheelQl which is carried o n thev pointerd shaft. The angular position of this r-ackvvaries Vthe relative positions as between the pointer on the shaft v,and the follower arnifl, VThe movement of theseparts is not very great, Vand prac vtice the; movement off the lfree end oi' theA thermostat oiabout 'one-quarter of an inch is ysulcient for-regulating thelmechanism throughv a. temperature -range of about works .in .conjunction the thermostat Vfor keeping the scale .accurate throughout a range of temperature. lBy referring to Fig. 4: it will be notedfthatthe pointvl9 and the point18fwhich"are the connections at Yopposite endsof the push rod 17.,.with the members l5 and 9 respectively, work inv reverse .,arcs'. AIn the-full lines the arm i5 is shown in a positionsothat the push rod- 17 is approximately perpendicular to the levers l5 andv 9. .Q'Ilh'e dottedlines show `a shifted .position of the. lever-l5, andthis results Vin the. shifting of the arc through which the `point l9'moves. Thus, the, push rod 17 is y `angularly changed with respect to the lever is of course tobe understood that the lever-9 will move slightly as varying tem- -peratu'res act on the counter-balancing.. 'splings.' Also', the springswill be extended tovar'ying lengths under a given load with varyingytemperatures, so that not only is there' an*initial change of position oi the arm v9, vbut its lowermost position varies.

A shifting of the lever l5 shifts the position 10i theiraclr 20, with respect to the gear wheel v. 4t2; f Y This is calculated for the'correct initial 1 rvariation in the. springs.

The distance between thev levers 9 and 15, when vthe scale is under load and operating,varies with the v. angular position of the push rod 17 in other words,`whe n the push rod 17v is as near perpendicular tol thesetwo levers as can be,

the distance is thegreatest. vVVhent-he push dicular, .the distance is lessened. llVhen the two levers are pulled down under a load'the points 19 and 18 pull away from each other, the amount oi which pulling. away, due to the reverse arcs and resulting angular position el the push rod 17, is controlled by the thermostat. rIhis is calculated to correct the scale reading'V when thesprings are under load. In other words, variation in the distending of the springs under a given load is met. by the variation and the angularity ofthe push rod so that the scale gives correct weights throughout the range of temperature.

Claims:

l. In va scale, the combination vof' means movable in the first instance in accordance with a load applied to the scale,'including a scale lever, a load resisting means, and a primary steelyard connecting the lever to the load resisting means, an adjustable connection between this primary steelyard and one oic the parts connected thereby, secofi ondary steelyard connecting a part oi the load resisting means to an intermediate member, an adjustable connection between this secondary steelyard and one of the members means including a `follower mechanism having a part associated with the said intermediate memberto position the indicating means in accordance with the position of this member, said part constituting a third portion ofthe steelyard, and an adjustable .connection between this said par-t andthe perature changes. A

3. In a scale,the combination of van arm associated with indicating means and adapted to move in accordance with weight applied to the scale, a pivoted support for this arm, a pivotal connection between this support andE the arm, a thermostatic element, and arconnection between the thermostatic element and the pivoted support for rotatably shifting the support on its pivot in accordance with temperature changes, whereby the position ot' the said arm associated with .the indicating means is accordingly varied.

4. In a scale, Vthe combination of scale indicating-means including a shaft and gear, a pivoted arm, a rack on the arm for engagement with the gear, saidarm being connected thereby, indicating@ i 2q .movable in accordance with a loadz movabi'e in accordance 'with wei t applied tothe scale, a ivoted support or the arm, and e. therm f tic"element"ating on this sup rtto rotatably yvary thesame in accd nce with temperature changes, whereby to vary the angular relation which'exists between the rack and the gear on the indicatingmeans. Y p

' 5. In a scale, thecmbinationof means movablev in the first instance in accordance a load a plied tothe scale, indicating means inclu 1n a `follower adapted, u on ease, to move toa distance determine by the movement of thejfirst xiielzitioned mea.ns,` and vcounterizfalancing means associated with the followerA mechanism for controlling the movement thereof.y @In a scale, the combination of means including a. pivoted' arm member ace A1on`-the scale, indicating means inclu a vfollower 'mechanism-5 said follower mec p'ivoted armfadapt'ed aoco ' scale,` indicating Ymeans inclu a 'follower a pivoted adaptedn n'release Y toi drop, means associated with e* arm for mine the amount of drop, `a thirdv having a connectionwiththea'pxvoted Varm ofthe follower and a counteieb ancing *weiight on one' end' of this thirdpivoted arm ing sai weight being adjustable toward'- and 'away from the pivot on this third larm, whereby to adjust the counterbalancin efffe'ct and control the dropping action o the *"follo'wer arm. f

8. In a scale,A the combination of two levers mounted to .work in reverse arcs, f' one of `which is movable in response to a load on the o scale,` theother of which is associated with yindicating mechanism, a 'push' rod operably connecting the levers, and means for varying the angular position of'thefpush rod m accordance with temperature change. 9; In a scale, the combination oftwo levers lmounted to workin reverse arcs, means con` y e Y necting thev twof'ievers, the'v opposite ends of which abov work in reverse arcs,v and means for thepesition ofl e are through which atleast one end v`of Athezvcon- "nectin means works, wherebyy to angularly 'shift t e conec'ting'means with respect to the two levers in accordance with tempera- -tuie change to vary the distance between the a," scale, the combination of means' l includin a ,pivoted arm"wix`ieh is 'movable ance with' a load`` 'laced on the 'Pgsitiengf the. c `t is an 'arl-position n v `1113011 f'tlg h A A nism compri o a 'upon release hnrop, means with'j the rst'mentioned h www amsm,i said follower mechanism" com- -gp -movabie in the and thermestate :forv varying he incassa points on thetwodevers 10. In va seele, ithe' combination of-,two leversx'azi'o'u'ntedI 4 p .t t. of which is springs and," which isf` the' instance in y ma inname 'on ea scale,tl1"e. other lever g indicating lmecha:tiene Ievexs' ed we, www meenemen-f dithermtatiefimews for feo-wy-I e Y t e lev ing `one "of the levers variation to raturechangef. f .4, 11. escale, the' a'jlevi movable intherst'instanee Marthe e w age 1 I Second i a @breed` oithe springsL thereforga. second' witmgeim' g the rst Ymentioned arm to deter- 'suppo pivcted therm change, vsax yevers the range of movemen4 oflthe levers to moet Y the fina variation lin springagiven'ld.

*ff 18. In escale vthe combination =ef`a l balancing being mounted tc work in push www meeneem the rst mentioned including a gear, ergehenv which engages the fonmentalit` mounting the pivot gular relation of the rack which is calculated? f to correctJ the indicating `mechanism meet initial variatiominthe counerbdaneem i :ai engem-ity ofthe@ s changee'thmugheut'l; `l

ing springs due to temperature change, the shifting of the pivot point also varying the angular position of the push rod, Which angular position progressively changes throughout movements of the levers due to the reverse aros, to vary the distance between the levers and which is calculated to meet the final Variation in the distention ofthe springs When under load.

In testimony whereof I affix my signature.

BERT W. KING. 

